Recent content by 78 Thompson

  1. 7

    Rear main seal 5.7

    Not trying to be a smart Azz, but this is the article I was looking at, I'm no scientist, so maybe I'm misunderstanding it. check it out pretty good info. Fluoroelastomer (FKM) rubber is a thermoset elastomer while Polytetrafluoroethylene (PTFE) is a thermoplastic. Both are fluorinated...
  2. 7

    Rear main seal 5.7

    My understanding by googling it, is that they are not the same. Fluoroelastomer is synthetic rubber, like Viton. PTFE is Teflon, I don't know if its just a coating or what, but you are not supposed to use grease on the seal lips. The GM seal has dabs of Grease all around the inside of the seal...
  3. 7

    Rear main seal 5.7

    So I talked to Fel-Pro and he said the correct one was BS-40520, standard nitrile and the BS40626 is the correct PTFE, for I believe 1986-1995, I ended up getting the GM 10088158 which is a FluoroElastomer not the PTFE, I wasn’t quite sold on that PTFE stuff. Lol Apparently in 1996 or later the...
  4. 7

    Rear main seal 5.7

    Felpro has a different number too, Bs40626 looks like for 95 and older maybe. Guess I will have to contact Felpro see if I can get this figured out. Holy crap who knows if I even put the right seal on to begin with. Lol
  5. 7

    Rear main seal 5.7

    I’m getting some confusing information searching for this seal. When I search 96 Chevy k1500 , I get GM 10088158 which has an ID. Of 3.78 inch and thickness of .510 the 12554314 has an ID. of 3.58 and thickness of 1.18 Is this something to do with the Vortec change over, my engine isn’t a...
  6. 7

    Rear main seal 5.7

    Just for future reference, how did you find the GM part number? Is there a site to search that or do you search a certain year Chevy car or truck?
  7. 7

    Rear main seal 5.7

    I bought a Felpro gasket set and it didn’t come with that install sleeve, I’m thinking this wasn’t the PTFE seal. So the Felpro Bs40656 is supposed to be installed dry right, are these as good as GM? Is the GM 12554314 the same material, PTFE, it says Teflon? Do I install the GM dry? I don’t...
  8. 7

    Rear main seal 5.7

    I'm pretty sure I put sealant in them crotches, I went by the book, the Mercruiser manual, so if it said to do it, I did it. I did have a hell of a time getting my fingers in there because of the stand, so on 1st attempt the seal folded over. I guess I should have just bought a new seal at that...
  9. 7

    Rear main seal 5.7

    This is my serial number OK012416
  10. 7

    Rear main seal 5.7

    I recently installed a rebuilt engine, a 96 mercruiser 5.7 I installed a Felpro rear seal, after reading more threads on rear seals, it sounds like maybe I wasn't suppose to put oil on the seal, so it appears to be leaking after running engine for a couple hours. I also had a hard time getting...
  11. 7

    Cam for 96 5.7

    I guess I didn't get that picture, I took a bunch of pictures before I took it to the machine shop, could have swore I took one of that number. where do I search that number if I had it?
  12. 7

    Cam for 96 5.7

    Do I want to search for a certain year range, I keep seeing LS stuff, is that the same as what I need?
  13. 7

    Cam for 96 5.7

    what would you say a set of lifter would run me?
  14. 7

    Cam for 96 5.7

    I'm pretty confused on what the right lifters are, that I would need. I was told it would be $800-1000 just for cam and lifters. What would the correct lifters be, how do I cross reference them? Do I just search for say a 96 chevy 1500? When I did a search on the Comp xm264hr I got a kit with...
  15. 7

    Cam for 96 5.7

    Yeah this probably won't be a performance build, engine only has the 2 barrel carb and I don't think I can afford to change that too. So I am confused on the prices of the cams this 7395 looks like you can get new for $268 and the mercruiser is $557? Then I'm not sure what the correct lifters...
See more
Top